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What are 'aquaporins' ? How does presenc...

What are 'aquaporins' ? How does presence of aquaporins affect osmosis ?

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There are the small pores present on cell membrane meant for movement of water. They permit movement of water as osmotic concentration gradient. Such pores remain open except during stretching of membrane.
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MODERN PUBLICATION-TRANSPORT IN PLANTS-NCERT EXEMPLAR PROBLEMS(SHORT ANSWER TYPE QUESTIONS)
  1. How is it that the intracellular level of K^(+) are higher than extrac...

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  2. Cut pieces of beetroot do not leave the colour in cold water but do so...

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  3. In a girdled plant, when water is supplied to the leaves above the gir...

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  4. Various types of transport mechanisms are needed to fulfil the mineral...

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  5. How can plants be grown limited water supply without compromising on m...

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  6. Will the ascent of sap be possible without the cohesion and adhesion o...

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  7. Keep some freshly cut flowers in a solution of food colour. Wait for s...

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  8. When a freshly collected Spirogyra filament is kept in a 10 % potassiu...

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  9. Sugar crystals do not dissolve easily in ice cold water. Explain.

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  10. Salt is applied to tennis lawns to kill weeds. How does salting tennis...

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  11. What is the chemical composition of of xylem and phloem sap ?

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  12. If you are provided with two tubes (A and B), where one is narrow and ...

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  13. What are 'aquaporins' ? How does presence of aquaporins affect osmosis...

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  14. ABA (Abscisic Acid) is called a stress hormone. A. How this hormone ...

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  15. We know that plants are harmed by excess water. But plants survive und...

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  16. Differentiate between diffusion and translocation in plants.

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  17. How is fcilitated diffusion different from diffusion ?

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  18. Explain the mass flow hypothesis of transport in phloem

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  19. Observe the diagram and answer the following: (a) Are these types of g...

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  20. Define uniport, symport and antiport. Do they require energy ?

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